- Added extra certificates and tests

diff --git a/tests/data_files/crl.pem b/tests/data_files/crl.pem
new file mode 100644
index 0000000..2102f04
--- /dev/null
+++ b/tests/data_files/crl.pem
@@ -0,0 +1,11 @@
+-----BEGIN X509 CRL-----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=
+-----END X509 CRL-----